Installed CREE Leds and took them right back out, great concept, but bad execution on the GT, reason being the light angle outward in the housing, so when you put it in reverse nothing behind you lights up, it lights up to the sides of the car.
I stuck a "Silverstar" reverse bulb in there and it seem slightly brighter, but it may just be a mind trick with the different color temp.
i would say slightly better. i have come to the conclusion that the turn signal and reverse lights are just about maxed out. led are brighter yes but never have the same coverage area as regular bulbs. brighter and easier to be seen but you cant see as well when trying to get better or more area light up. and tinted windows makes it more difficult and tinted tail lights worse .